/**
 * Copyright 2011 Joao Miguel Pereira
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package eu.jpereira.trainings.designpatterns.behavioral.state.command;

import java.util.HashMap;
import java.util.Map;

import eu.jpereira.trainings.designpatterns.behavioral.state.appliance.Appliance;
import eu.jpereira.trainings.designpatterns.behavioral.state.appliance.snapshot.Snapshot;

/**
 * @author jpereira
 * 
 */
public abstract class AbstractCommand implements UndoableCommand {

	protected Appliance receiverAppliance = null;
	
	protected Map<Command, Snapshot> snapshots;

	protected AbstractCommand(Appliance appliance) {
		this.receiverAppliance = appliance;
		this.snapshots = createSnapshots();
	}

	/**
	 * factory method
	 * @return
	 */
	protected  Map<Command, Snapshot> createSnapshots() {
		return new HashMap<Command, Snapshot>();
	}
}
